Port Role - ZyXEL Communications ISG50-ISDN User Manual

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Chapter 12 Interfaces

12.2 Port Role

To access this screen, click Configuration > Network > Interface > Port Role. Use the Port

Role screen to set the ISG50's flexible ports as part of the lan1, lan2 or dmz interfaces. This

creates a hardware connection between the physical ports at the layer-2 (data link, MAC address)

level. This provides wire-speed throughput but no security.

Note the following if you are configuring from a computer connected to a lan1, lan2 or dmz port

and change the port's role:

A port's IP address varies as its role changes, make sure your computer's IP address is in the same

subnet as the ISG50's lan1, lan2 or dmz IP address.

Use the appropriate lan1, lan2 or dmz IP address to access the ISG50.

Figure 170 Configuration > Network > Interface > Port Role

Each section in this screen is described below.

Table 63 Configuration > Network > Interface > Port Role

These are physical Ethernet ports.

These are Ethernet interfaces and the zone to which each belongs. Use the radio

buttons to select for which interface (network) you want to use each physical port. For

example, select a port's lan1 (LAN1) radio button to use the port as part of the lan1

interface. The port will use the ISG50's lan1 IP address and MAC address.

When you assign more than one physical port to a network, you create a port group.

Port groups have the following characteristics:

There is a layer-2 Ethernet switch between physical ports in the port group. This

provides wire-speed throughput but no security.

It can increase the bandwidth between the port group and other interfaces.

The port group uses a single MAC address.

Physical Ports

ISG50 User's Guide